mocha-aura-component-adapter.js

// inputFieldAdapter.js
const sinon = require('sinon');

exports.inputFieldAdapter = function inputFieldAdapter(componentInstance, params = {}) {
  const setParam = (cmp, name, value) => cmp.params[name] = params.hasOwnProperty(name) ? params[name] : value;
  // Set default property values on a component instance
  setParam(componentInstance, 'label', '');
  setParam(componentInstance, 'fieldType', '');
  ...
  // Add component-specific methods on component instance
  componentInstance.validate = sinon.spy();
  componentInstance.updateValue = sinon.spy();
  ...
  componentInstance.clearOptions = sinon.spy();
  return componentInstance;
}

// baseUIAdapters.js
const { inputFieldAdapter } = require('./adapters/inputFieldAdapter')

exports.baseUIAdapters = ({register}) => {
  register('BaseUI:InputField', inputFieldAdapter)
}